(B) The cyclopentadienyl anion is a cyclic,planar species with $6 \pi \ e^-$ (where $n=1$ in the $4n+2$ $H$ückel rule). Since it contains $6 \pi \ e^-

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(B) The cyclopentadienyl anion is a cyclic,planar species with $6 \pi \ e^-$ (where $n=1$ in the $4n+2$ $H$ückel rule). Since it contains $6 \pi \ e^-$,it follows $H$ückel's rule and is aromatic. Because it does not contain a benzene ring,it is classified as non-benzenoid. Therefore,it is non-benzenoid and aromatic.

Class 11 Chemistry Hydrocarbons Aromatic hydrocarbon

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The cyclopentadienyl anion is:

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A
benzenoid and aromatic
B
non-benzenoid and aromatic
C
non-benzenoid and non-aromatic
D
non-benzenoid and anti-aromatic

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Class 11

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Hydrocarbons

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Aromatic hydrocarbon

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The reaction of benzene with $CO$ and $HCl$ in the presence of anhydrous $AlCl_3$ gives :

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Which of the following procedures would be best for achieving the following reaction?

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Product $(A)$ is

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The correct arrangement for the decreasing order of electrophilic substitution for the above compounds is:

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Arrange the following in decreasing order of the rate of electrophilic aromatic substitution:

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The cyclopentadienyl anion is:

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The reaction of benzene with $CO$ and $HCl$ in the presence of anhydrous $AlCl_3$ gives :

Which of the following procedures would be best for achieving the following reaction?

Product $(A)$ is

The correct arrangement for the decreasing order of electrophilic substitution for the above compounds is:

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